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Burrow (Ravener Brood)   
Data version: 3.19
Dow2 tyr burrow icon Unit(s) Ravener Brood Burrows underground, moving 25% slower but bypass terrain obstacles, are immune to knockback, and count as infiltrated. When the Raveners unburrow, they do weapon knockback and stun enemy infantry for 4 seconds in radius 10. 30 second cooldown.
Requires Enhanced Muscle Coil
Cost Dow2 energy 1650